Oil, natural gas, coal, hydropower, solar energy, etc. Among them, solar energy is a new energy.
Solar energy is a renewable energy source. It refers to the radiant thermal energy of the sun (see the three modes of propagation of thermal energy: radiation), and its main manifestation is often called solar rays. Nowadays, it is typically used to generate electricity or provide energy for water heaters.
Principles of solar energy technology
Solar radiation energy is generated by the fusion of hydrogen and helium inside the sun to release enormous nuclear energy. Most of the energy needed by humans comes directly or indirectly from the sun. Plants release oxygen, absorb carbon dioxide and convert solar energy into chemical energy and lstored in the plant body through photosynthesis.